00:01
This question asks us about red blood cells.
00:05
So first, we will describe the structure of a red blood cell, including the molecule hemoglobin.
00:09
Then we will discuss the role of the red blood cells in blood, and also we will determine how the production of red blood cells will be regulated.
00:18
So to start off, we will describe the structure of a red blood cell.
00:22
So we know that our red blood cell can be described as a biconcave disc, meaning that it is going to be a cell which lacks a nucleus.
00:44
And that's where this concavity comes from in that instead of the nucleus, we are going to have this depression in the red blood cells plasma membrane on both sides that will kind of make it look like a donut.
00:57
Now, this donut is not completely punched out, so there's no hole in the middle.
01:02
So, you know, our regular donut, we would see that this hole right here, something could pass through.
01:10
But in the case of a red blood cell this is just a depression so it's going to just be thinner at the center than it is on the sides now if we are referring to hemoglobin we know that it is going to consist of two polypeptide chains or two protein chains that will form the globin portion and then at the very center we will have what is called a heem group and basically this is going to be a chemical a molecule that will contain an iron center.
01:42
And this iron is going to allow for binding with oxygen...